I have no problem with the name "Raynor," although as a StarCraft reference I admit it's a little silly. But the fact is that it is now associated with one of the iconic ships of Blue Planet, and it irks me a bit to have such a prominent detail changed so long after release.
I cannot fault you for switching to a name that is so much better on paper, but I do think that it has its flaws. "Erebus," while a cool-sounding name and technically awesome, doesn't sound very memorable or distinct to me. "Raynor," "Titan," and "Orion" before them were very memorable, and therefore faster and easier to associate with cool ships.
On the other hand, even names like "Hatshepsut" eventually get drilled into players' skulls.